His historical thought inciude positive and backward factors, we should make a concrete analysis of it.

他的史学思想既有积极因素，也有局限性，必须具体分析。

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We should make a concrete analysis of concrete problems.

我们应该对具体的问题作具体的分析。

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We should make a concrete analysis of concrete problems.

我们应该对具体的问题作具体的分析。

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